ESR STUDY OF THE STRUCTURE OF INTERCALATION COMPOUNDS OF FLUORINATED GRAPHITE AND PROCESSES OCCURRING THEREIN USING NO2 AND CLO2 RADICALS AS SPIN PROBES

For intercalation compounds of fluorinated graphite at 77-300 ii: the parameters of the spin Hamiltonian are determined from the angular dep endence of Me ESR spectra, the NO2 and ClO2 radicals are located and t heir mobility at low temperatures is studied At 77-200 K; vibrational and rotational motions around the oxygen-oxygen axis are defreezed Thi s is attributed to donor-acceptor interactions between the negatively charged oxygen atoms of NO2 and ClO2 radicals and the positively charg ed carbon atoms of fluorinated graphite. The calculated activation ene rgies (0.35 kcal/mole for ClO2 and 0.6 kcal/mole for NO2) for defreezi ng the rotational-vibrational motions of these two radicals are close. Using NO2 radical's as spin probes allowed us to find two types of re gions in ICFG, which differ in the rate of NO2 diffusion. These region s are supposed to be the filled and unfilled parts of graphite fluorid e layers. It is attempted to explain the low pressure of the saturated vapor of the intercalate over ICFG by the presence of unfilled layers near the boundaries of ICFG flakes.